\paragraph{DP1}\label{DP1}
\begin{description}
  \item [Statement] \textnormal{The system shall be regularly available 24h each day, except during maintenance time.}
  \item [Priority] \textnormal{A}
\end{description}

\paragraph{DP2}\label{DP2}
\begin{description}
  \item [Statement] \textnormal{A downtime for maintenance will only occur once a week on Sunday between 2:00 AM and 3:00 AM.}
  \item [Priority] \textnormal{A}
\end{description}

\paragraph{DP3}\label{DP3}
\begin{description}
  \item [Statement] \textnormal{The system shall respond at least 99\% of all queries, except during maintenance time.}
  \item [Priority] \textnormal{A}
\end{description}